Amoeba, Giant

Small ooze, unaligned

Armor Class 8
Hit Points 39 (6d6+18)
Speed 10 ft., climb 10 ft., swim 20 ft.

12 (+1) 6 (-2) 16 (+3) 1 (-5) 7 (-2) 2 (-4)

Skills Stealth +2
Damage Immunities acid
Condition Immunities blinded, charmed, deafened, exhaustion, frightened, prone
Senses blindsight 60 ft. (blind beyond this radius), passive Perception 8
Challenge 1/2 (200 XP)


  • Amorphous. The giant amoeba can move through a space as narrow as 1 inch wide without squeezing.
  • Amphibious. The giant amoeba can breathe both air and water.


  • Pseudopod. Melee Weapon Attack: 5 ft., +3 to hit, 1d6+1 (4) bludgeoning damage and 2d6 (7) acid damage, and the target is grappled if it is Medium or smaller (escape DC 11). Until this grapple ends, the target is restrained and the giant amoeba can’t make pseudopod attacks on another creature.


A giant amoeba is a shapeless mass of living, liquid protoplasm. Though naturally translucent with darker interior spots, its surface is slightly sticky and tends to collect dirt and other debris from its environment; therefore, a moving giant amoeba looks like muddy water. Although happy to prey on creatures smaller than it, the giant amoeba’s constant hunger often drives it to attack larger prey, such as humanoids.

Amoeba Swarms. An amoeba swarm is a mobile group of amoebas, each about the size of a coin. Giant amoebas may cleave off tiny portions of their substance, which can then become amoeba swarms. At other times, a giant amoeba can spontaneously transform into a swarm, usually if the giant amoeba is starving or in an area with a high concentration of magic. Likewise, a well-fed amoeba swarm may fuse into a single giant amoeba.

When an amoeba swarm is found in the vicinity of a giant amoeba, the two oozes ignore each other. A giant amoeba in the space of an amoeba swarm takes no damage from the swarm’s attacks and does not run the risk of becoming distracted as a result of being in the swarm.

Section 15: Copyright Notice

Aegis of Empires Adventure Path © 2021, Legendary Games; Authors: Greg A. Vaughan, Matt Goodall, Steve Helt, Tom Knauss, Anthony Pryor, Alistair J. Rigg, and Jeffrey Swank; based on original material by Greg A. Vaughan.

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